If you have an unlocked Windows Phone device that you want to bring over to T-Mobile’s network in the U.S., you can get a SIM card for free with a coupon. That’s with free shipping, too. Just wait for the SIM card in the mail, choose a plan, and put the SIM card in your phone.

T-Mobile’s SIM cards are usually sold for $10. Head over to their online store and enter coupon code: NOVSIM. There appears to be a limit of two cards per customer.

There are three types of SIM cards so check your phone. For example, the Nokia Lumia 925 and Nokia Lumia 1020 use the micro SIM. Interestingly enough, the Nokia Lumia 1520 uses the nano SIM. Here are the listings for the three types of SIM cards on T-Mobile:

Went through just fine for me. Though it said the micro sim was backordered. Not sure what the difference is between phone and mobile internet micro sim, would think it would just be configured different on their side not a different card. Ordered one of each.

What's weird, is I have several T-Mo SIM cards, all of them were just given to me when I went into the T-Mo stores here in the USA.I just asked nicely and they just handed them to me. I have one of each size, non of them are activated (except the one in my Lumia 810).

The only one's I don't have, is their "Secure SIM" cards.Mainly because the clerks don't know much about them. Secure SIM cards are the cards needed for NFC payment, which hasn't been rolled out, except to locations that are testing them.

It's not but in T-Mobile refarmed areas, such as where I live in Boston, you can pick up 4g and such on an unlocked at&T device. I'm not entirely sure about lte but id have to check the unlocked 900 I gave my mom.

Yep, had a satellite phone that used a regular credit card sized sim card. The old small ones are mini sim, then micro, and now nano. Can't wait for the pico sim cards to come out. That way, when you swap phones, you have to use tweezers.

Been with Tmo in the US for years, have used the SIM I have with my 800, 620 and now the 1020.. Works like a charm. When I am in the US I use the $3/day plan which gives you 200MB on Max speed available on your phone and region and falls back to 2G after that.

Ok everybody get ready for a dumb question, and feel free to,make fun of me. What is the difference between Phone and mobile internet? Does mobile internet means tablets and such, no phone service? Sorry, I feel like an idiot now

Well both work via the air but they have different ways of registering at the service i think. one is used for pure data network connection and the other one is connecting as a voice service. so one for tablets and one for smartphones. phablets would need voice sims. i think the sim ports are not compatible with each other

I have a "dumb" question too. If I order a SIM card using this offer will the SIM be tied to the account information that I entered during the purchase phase? I placed an order for a micro SIM card using my personal information. The intenion is to use the SIM in my wife's new phone. Will she encounter any isssues with setting up her account and using the SIM on her phone as it was ordered under my name?

The answer is no, its not tied to your purchasing information. The SIM comes with its own number by default and requires setting up an account. But you can call T-Mo to get associated with a current number and current account.

I created an account on WPCentral just to post this comment (though I have been a fan of this site since purchasing a Lumia 920 the week it debuted in the US):

1) Purchasing this "free" SIM card WILL STILL initiate a credit check

2) These SIMs CANNOT be activated after 60 days of inactivity (meaning they would be useless as back-up SIMs--the main reason I wanted to take advantage of this coupon code)

The above two facts were told to me by a T-Mobile rep moments before I hit the "submit my order" button. Having back-up SIMs that expire after 60 days and are "free" but cost a decline in my credit score is not worth it. Good luck to everyone else though!